Hot-water-supply tank.



mmm

0. F. TROOST.

HOT WATER SUPPLY TANK. APPLICATION mm mm 29. ms

Inven for CHRISTIAAN FREDERIK TROUET, U1 ABNHEM, NETHERLANDS.

I-IOT-WATER-SUPPLY TANK.

Specification of Letters Patent.

Patented I lov. 2?, ilhi't.

Application filed May 29, 1916. Serial No. 100,720.

To all whom it may concern:

Be it known that I, Cr-iinIs'rIAAN FREDE- RIK Tnoosr, a subject of the Queen of the ll'etherlands, and residing at Utrechtscheweg 65, Arnhem, the Netherlands, have invented certain new and useful Improvements in Hot-lVatenSupply Tanks, of which the following is a specification.

This invention relates to hot water supply systems and its object is to generally improve the operation thereof.

As is generally known hot water supply systems for private residences, hotelsand the like are usually provided with a closed tank which both at the bottom and at the top is connected to a system of pipes circulating through the furnace. This tank is further connected at the bottom to a cold water tank situated at a higher level, from which tank the quantities of hot water with- I drawn from the hot water tank are con stantly being replaced, and at the top to the hot water discharge pipe.

As long as the furnace is burning Well such. a system does not give any trouble. However, when the fire is extinguished or when it is burning low so that it does not develop sufficient heat, then the trouble is met with that when but a comparatively slight quantity of hot water has been withdrawn from the hot water supply tank, this discharge pipe no longer delivers hot water but only tepid water. This trouble is especially experienced when the fire in the furnace,for example, a kitchen range, has not been alight throughout the night. The reason why this trouble is met with is self explanatory. If the contents of the hot water tank are no longer sufficiently heated, then dependent upon the suitability of the insulation of the hot water tank the contents thereof will still remain at a high temperature for a longer or shorter period, so that at first it will be possible to withdraw hot Water therefrom. This quantity of initially withdrawn water is, however, immediately replaced by cold water which in part at once mixes with the contents of the hot water tank and which after a while causes the temperature in the tank to drop.

According to the present invention this objection is readily removed in a simple.

manner by providing between the connection of the cold water supply and that of the hot water discharge pipe one or more partitions each provided with a comparafor the greatest part be withdrawn at an unchanged or nearly unchanged high tempera ture without the cold water flowing into the tank causing a substantial drop in temperature therein.

In the accompanying drawing two diflerent methods of carrying the invention into eifect are illustrated by way of example.

Figure 1 shows a hot water tank provided with a single vertical partition.

Fig. 2 shows a similar tank provided with a plurality of vertical partitions.

Referring first to Fig. 1, the numeral 1 designates thehot water tank, the contents of which may be withdrawn by means of the pipe 2, the tank constantly being refilled through the pipe 3 from a cold water tank situated at a higher level. The pipe 2 leads into the top of the tank and the pipe 3 into the bottom thereof. The circulation pipe 4 transmits the heat developed in a suitable furnace to the contents of the tank 1. a

In the drawing the direction of the flow of the water is indicated by means of arrows.

According to the invention between the connections of the pipes 2 and 3 a vertical partition wall 6 is provided, which partition is provided at the top with a comparatively small opening to receive the end 7 of a pipe 8 the other end of said pipe opening into the lower end of that part of the tank from which leads the outlet pipe 2 and being as remote as possible from said outlet pipe 2.

Assume now that the furnace does not supply any heat, or not sufficient, but that the water contents of the tank, which as a matter of course is insulated, are still at a high temperature. By opening the cock or valve in the pipe 2 hot water may, therefore, be withdrawn which is replaced by the cold water flowing into the tank through the pipe 3. This infiowing cold water will cause a drop in temperature of the water to the left of the partition 6, however, as this quantity of water is in communication with the water to the right of the partition 6 through the small pipe 8 only, the temperature of the cold supply water will not have a conslderable influence upon the water to the right of the partition 6. The latter may, therefore, be withdrawn at once or successively at a highter'nperature.

In Fig. 1 a hot water tank is shown the contents of which are heated by a medium brought to a high temperature, said medium fl0wing'through the spirally wound circulating pipe. 7 j

providing not one but a plurality of partitions 6 in such a manner that the passages in the successive partitions are situatedat the greatest possible distance from one another, the invention may be made.

still'lnor'e effective. Such an arrangement is shown inFig. 2 which also shows diagrammatically a furnace 5. j V

In this form of course each partition 6 is provided with a pipe 8 leading from thetop of one'cell or section of the tank to the bottom of the next cell 01- section to the right. j j I In this forni the heating, instead of beingeifected by a spiral coil as in Fig. 1, is effected by leading' the water from the furnace 5 intothe top of the extreme right handc'ell of the tank preferably in the vi cinity ofthe' cliscl1arge pipe 2 and leading waterback tothe furnace from the bottom of theextreme' left hand cell. as shown. It is" further advisable to employ a suitable insulating material for the partitions and toladmitthe cold supplywater to the. tank near, the bottom in a quiet fiat stream in order to obtain a L very gradual mixing thereof with the water 1n the first cell.

Itwill be readily understood that the present invention is not limited tothe special examples described hereinbefore and illustrated by the drawin .v The lnvention 1. In, ()OlfibiildtiQIljVitll a hot water tank,

. i u i. 0 n. u a substant ally j vertical part tion extend ng across said tank, a communicating passage through said partition connecting the upper part of one portion of the tank directly to the lower part of the other portion, a cold water inlet entering the first mentioned portion of the tank at the lower part thereof, anda hot water outlet leaving the second mentioned portion of the tank at the upper part thereof.

2. In combination with a hotwater tank, a substantially verticalpartition entending across said tank to divide it into two portions, a communicating V passage through said partition connecting the upper part of one portion of thetank to the lower part of the other portion, av cold water inlet entering the first mentioned portion of the tank at the lower partthereofan d remote;

in a horizontal direction, from'the communicating passage, and a hot water outlet leaving the second mentioned portion of the tank at the upper part thereofand' remote, in a horizontal direction, from the communicating passage. 7

3. In combination With a hot watertank, a substantially vertical partition extending across said tank to divide it into two per tions, a' communicating pipe, situated within the tank, passing through saidpartition and having its upper end located adjacent the partition in the upper part of one portion of the tank and its lower end "located adjacent the partition in the lower part of the other portion ofthe tank, acold water inlet entering the first-mentioned portion of the tank at the lower part thereof and remote from the partition, and a. hot water;

outlet leaving the second-mentioned portion of the tank at the upper part thereof and remote from the partition.

4. A hot water tank, comprising a pl u f rality of cells arranged side by,side,vertical separating walls between said cells, a; communicating passage through each ofsaid walls connecting the upper part of onecell di-' rectly to the lower part of the adj acent'cell,

a cold water inlet entering at thelower part of the first cell ofthe series and from which:

cell the communicating passage opens from the upper part, and a hot water outlet leaving at the upper ,part of the last cell of the series and into which cell the communicating passage opens into thellower part.

In testimony whereof I a ffix gmy signature in presence of two wltnesses.

GHRISTIAAN FRE'DERIK most.

IVitnesses:

H. F. Koor,

A. C. NELsoN.

n life Y 1Q L i Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

